Method and apparatus for manufacturing surface fastener
AssigneeYKK Corporation
InventorsToshiaki Takizawa, Ryuichi Murasaki
Life of this patent
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Abstract
Molten resin is extruded in a predetermined width from an extrusion nozzle. The molten resin is forced to a die wheel, which is situated facing the extrusion nozzle with a predetermined gap therewith, has inside a cooling unit and is adapted to be rotated in one direction. On the surface of the die wheel, a flat-plate-like substrate member and engaging members are integrally molded of the molten resin. Simultaneously, as a continuous filament is supplied, loop members are successively formed. Then the loop members are pressed against the substrate member in upright posture and are successively fused therewith.
Claims14
A method of continuously manufacturing a surface fastener, comprising the steps of:
- (a) extruding molten resin from an extrusion nozzle;
- (b) extruding the extruded molten resin against a one-way-rotating die wheel which has in it cooling means and is situated in a confronting relationship with the extrusion nozzle with a gap for molding a flat-plate substrate sheet;
- (c) continuously molding said flat-plate substrate sheet by rotating the die wheel in a direction of extrusion of the molten resin;
- and
- (d) continuously attaching a continuous filament to the substrate sheet while said filament is formed into successive loop members, by pressing the loop members in an upright posture against the substrate sheet.
An apparatus for continuously manufacturing a surface fastener, comprising:
- (a) a die wheel having in it means for cooling and adapted to be driven for one way rotation;
- (b) an extrusion nozzle situated in a confronting relationship with said die wheel with a gap for molding a flat-plate substrate sheet therebetween and having an extrusion passageway for molten resin;
- and
- (c) a loop-member-forming wheel adapted to be situated adjacent to a surface of said substrate sheet for forming a straight filament into successive loops for attachment of said loops in an upright posture to said substrate sheet.
Dependencies are inferred from the claim text.